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766497bd5d
Rebuilds libv86.js from felixrieseberg/v86@windows95-base, which now carries vga-defer-vbe-disable-v86: when a windowed DOS VM's vgabios writes dispi[4]=0, Win9x's VDD passes that through (it doesn't know about ports 1CE/1CF) while virtualising the rest of the mode-set, so v86 used to drop out of LFB rendering with the legacy registers still holding SVGA values and the screen turned to planar garbage. The fix defers the disable until a legacy attribute-mode write actually reaches the hardware. debug-harness: WIN95_PROBE_DOSBOX=1 opens command from Run, types dir, optionally Alt+Enters (WIN95_PROBE_DOSBOX_ALTENTER=1). WIN95_PROBE_VGATRACE=1 wraps the VGA io.ports[] entries (not the VGAScreen methods, which are captured by-value at registration) and dumps [port, op, value, eip+VM/PE/CPL] tuples to /tmp/win95-vgatrace.json — that EIP/mode column is what pinned the leak on V86-mode vgabios at C000:2C8x.